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Database: 189760 (18 Oct 2025)
JJG 28-2019
Chinese Standard: 'JJG 28-2019'
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JJG 28-2019
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JJG 28-2019
Valid
JJG 28-2019
SIMILAR
unprotected-true-PDFs:
JJF 1951-2021
JJG 818-2018
JJG 517-2016
JJF 1561-2016
JJG 1114-2015